Jo-Rae Perkins commands a strong 59.5% implied probability on Polymarket to win the Oregon Republican primary for State Senate District 20, reflecting her superior name recognition from the 2020 U.S. House race and recent polling edges, including a mid-April survey showing her at 42% to David Brock Smith's 28%. Perkins' fundraising lead—over $150,000 raised versus Smith's under $80,000—bolsters her ad buys in the May 21 primary, appealing to the conservative base in southern Oregon's rural districts. Smith, a Klamath Falls city councilor, holds local endorsements but trails amid low expected primary turnout favoring motivated partisans. Minor candidates like Russell McAlmond lack momentum, with odds underscoring a two-way race. Upcoming absentee ballot returns and any late endorsements could narrow the gap.